Remove tortillas from refrigerator; set aside.,Heat oven to 350°.,In nonstick skillet, melt margarine.,Cook onion and garlic until tender.,Stir in green chilies, sour cream and soup; mix well.,Reserve 3/4 cup sauce; set aside.,Stir in chicken and 1/2 cup cheese to remaining sauce in skillet.,Warm tortillas according to package directions.,Fill tortillas with chicken mixture; roll up.,______,In small bowl, combine reserved sauce and milk; spoon over rolled tortillas.,Top with remaining 1/2 cup cheese. Bake for 30 to 35 minutes or until bubbly.